61240741620 has 96 divisors (see below), whose sum is σ = 179249559552. Its totient is φ = 15592883328.

The previous prime is 61240741531. The next prime is 61240741699. The reversal of 61240741620 is 2614704216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737529 + ... + 816351.

It is an arithmetic number, because the mean of its divisors is an integer number (1867182912).

Almost surely, 2^61240741620 is an apocalyptic number.

61240741620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61240741620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89624779776).

61240741620 is an abundant number, since it is smaller than the sum of its proper divisors (118008817932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61240741620 is a wasteful number, since it uses less digits than its factorization.

61240741620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79421 (or 79419 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 61240741620 in words is "sixty-one billion, two hundred forty million, seven hundred forty-one thousand, six hundred twenty".